EP4404426A1 - Batterievorrichtung, batterieverwaltungssystem und verfahren zur konfiguration der vorladungsperiode - Google Patents

Batterievorrichtung, batterieverwaltungssystem und verfahren zur konfiguration der vorladungsperiode Download PDF

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Publication number
EP4404426A1
EP4404426A1 EP22887368.3A EP22887368A EP4404426A1 EP 4404426 A1 EP4404426 A1 EP 4404426A1 EP 22887368 A EP22887368 A EP 22887368A EP 4404426 A1 EP4404426 A1 EP 4404426A1
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EP
European Patent Office
Prior art keywords
precharge
voltage
time
connection terminal
duration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP22887368.3A
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English (en)
French (fr)
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EP4404426B1 (de
EP4404426A4 (de
Inventor
Hojoon Lee
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LG Energy Solution Ltd
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LG Energy Solution Ltd
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Publication of EP4404426A4 publication Critical patent/EP4404426A4/de
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/60—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements
    • H02J7/62—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements against overcurrent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
    • H02J7/345—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering using capacitors as storage or buffering devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/60—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements
    • H02J7/663—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements using battery or load disconnect circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/80—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including monitoring or indicating arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/855—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/865—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/90—Regulation of charging or discharging current or voltage
    • H02J7/96—Regulation of charging or discharging current or voltage in response to battery voltage
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the disclosure relates to a battery device, a battery management system, and a precharge duration setting method.
  • Electric vehicles and hybrid vehicles are vehicles obtaining power by mainly using batteries as power sources for driving motors, and are alternatives capable of solving pollution and energy problems of internal combustion vehicles. For this reason, research has been actively carried out on them. Further, rechargeable batteries have been used in vehicles and even in various other external apparatuses.
  • battery packs including a plurality of battery cells connected in series or parallel have been used. Furthermore, the potential risk of battery packs has increased as their power and capacity have increased. Particularly, when an overcurrent flows in a battery pack, if the overcurrent is not diagnosed, due to the overcurrent, problems may occur in external devices.
  • Precharge circuits can prevent rush current by first charging capacitors connected to inverters and so on of external devices through precharge resistors in the initial stage of driving. By the way, if the time that it takes to precharge a capacitor is not sufficient, a main switch may be closed in the state where the capacitor has not been charged to a sufficient voltage. In this case, the main switch may be damaged due to the difference between the voltage of the battery pack and the voltage of the capacitor.
  • the present disclosure has been made in an effort to provide a battery device, a battery management system, and a precharge duration setting method having merits of being capable of minimizing damage to a main switch.
  • An embodiment provides a battery device including a positive connection terminal and a negative connection terminal which are connected to an external device.
  • the battery device may include a battery pack, a positive main switch, a precharge switch, and a processor.
  • the positive main switch may be connected between the positive terminal of the battery pack and the positive connection terminal.
  • the precharge switch may be connected between the positive terminal of the battery pack and the positive connection terminal, and control the precharge operation of a capacitor of the external device.
  • the processor may estimate a target time of a precharge duration in each of a plurality of cycles, and set the time of a precharge duration of the next cycle of the plurality of cycles, on the basis of the target times estimated respectively in the plurality of cycles.
  • the processor may set the maximum value of the target times estimated respectively in the plurality of cycles, as the time of the precharge duration of the next cycle.
  • the processor may perform precharge by closing the precharge switch during the precharge duration, and close the positive main switch after the precharge duration, and estimate the target time on the basis of a first voltage of the positive connection terminal immediately before closing the positive main switch and a second voltage of the positive connection terminal immediately after closing the positive main switch.
  • the battery device may further include a precharge resistor that is connected between the positive terminal and the positive connection terminal when the precharge switch is closed.
  • the precharge switch and the precharge resistor may be connected in series.
  • the processor may estimate a time constant that is defined by the resistance value of the precharge resistor and the capacitance of the capacitor, on the basis of the first voltage and the second voltage, and estimate a predetermined multiple of the time constant as the target time.
  • the predetermined multiple may be 5 times the time constant.
  • the processor may set the time of the precharge duration of the corresponding cycle on the basis of the time taken for the voltage of the positive connection terminal to reach a predetermined voltage in the precharge duration.
  • the predetermined voltage may be a voltage corresponding to a predetermined ratio to the voltage of the battery pack.
  • the predetermined ratio may be determined on the basis of the predetermined multiple of the time constant defined by the resistance value of the precharge resistor and the capacitance of the capacitor.
  • the processor may estimate the time constant on the basis of the time taken for the voltage of the positive connection terminal to reach the predetermined voltage during the precharge duration, and set the predetermined multiple of the time constant as the time of the precharge duration of the corresponding cycle.
  • the predetermined multiple may be 6 times the time constant.
  • the precharge duration setting method may include a step of performing a precharge operation of precharging a capacitor connected to the positive connection terminal and the negative connection terminal through a precharge resistor during the precharge duration of each of a plurality of cycles, a step of estimating a target time of the precharge duration in each of the plurality of cycles, and a step of setting the time of the precharge duration of the next cycle of the plurality of cycles, on the basis of the target times estimated in the plurality of cycles, respectively.
  • the step of setting the time of the precharge duration may include a step of setting the maximum value of the target times estimated respectively in the plurality of cycles, as the time of the precharge duration of the next cycle.
  • the step of estimating the target time may include a step of applying the voltage of the battery pack to the positive connection terminal after performing the precharge operation, a step of measuring the voltage of the positive connection terminal as a first voltage immediately before applying the voltage of the battery pack, a step of measuring the voltage of the positive connection terminal as a second voltage immediately after applying the voltage of the battery pack, and a step of estimating the target time on the basis of the first voltage and the second voltage.
  • the step of estimating the target time on the basis of the first voltage and the second voltage may include a step of estimating a time constant that is defined by the resistance value of the precharge resistor and the capacitance of the capacitor, on the basis of the first voltage and the second voltage, and a step of estimating a predetermined multiple of the time constant as the target time.
  • the battery management system may include a positive main switch, a precharge switch, and a processor.
  • the positive main switch may be connected between the positive terminal of the battery pack and the positive connection terminal.
  • the precharge switch may be connected between the positive terminal of the battery pack and the positive connection terminal, and control the precharge operation of a capacitor of the external device.
  • the processor may estimate a target time of a precharge duration in each of a plurality of cycles, and set the time of a precharge duration of the next cycle of the plurality of cycles, on the basis of the target times estimated respectively in the plurality of cycles.
  • constituent element when referred to as being “connected” to another constituent element, it may be directly connected to the other constituent element, or other constituent elements may be present between them. In contrast, it should be understood that when a constituent element is referred to as being “directly connected” to another constituent element, there is no other constituent element between them.
  • FIG. 1 is a drawing illustrating a battery device according to an embodiment
  • FIG. 2 is a drawing illustrating switching timings in the battery device according to the embodiment.
  • a battery device 100 has such a structure that it can be electrically connected to an external device 10 through a positive connection terminal DC(+) and a negative connection terminal DC(-).
  • the battery device 100 operates as a power source for supplying power to the load, thereby being discharged.
  • the external device 10 operating as a load may be, for example, an electronic apparatus, a transportation means, or an energy storage system (ESS), and the transportation means may be, for example, an electric vehicle, a hybrid vehicle, or smart mobility.
  • ESS energy storage system
  • the battery device 100 includes a battery pack 110, a switch circuit, a precharge circuit, a sensing circuit 140, and a processor 150.
  • the battery pack 110 includes a plurality of battery cells (not shown in the drawings), and has a positive terminal PV(+) and a negative terminal PV(-).
  • the battery cells may be secondary batteries which are rechargeable.
  • a predetermined number of battery cells may be connected in series to constitute a battery module, and supply desired power.
  • a predetermined number of battery modules may be connected in series or in parallel, and supply desired power.
  • the switch circuit includes a positive main switch 121 connected between the positive terminal PV(+) of the battery pack 110 and the positive connection terminal DC(+) of the battery device 100, and a negative main switch 122 connected between the negative terminal PV(-) of the battery pack 110 and the negative connection terminal DC(-) of the battery device 100.
  • each of the switches 121 and 122 may be a contactor composed of a relay.
  • each of the switches 121 and 122 may be an electric switch such as a transistor.
  • the switch circuit may further include driver circuits (not shown in the drawings) which control the switches 121 and 122, respectively.
  • the precharge circuit is connected between the positive terminal PV(+) of the battery pack 110 and the positive connection terminal DC(+) of the battery device 100, and can first charge a capacitor 11 of the external device 10 which is connected to the connection terminals DC(+) and DC(-) during a precharge duration.
  • the precharge circuit may include a precharge resistor 131 and a precharge switch 132. In the case where the precharge switch 132 is closed, the precharge resistor 131 can be connected between the positive terminal PV(+) of the battery pack 110 and the positive connection terminal DC(+) of the battery device 100. Accordingly, the precharge circuit can first charge the capacitor 11 of the external device 10 through the precharge resistor 131.
  • the precharge resistor 131 and the precharge switch 132 may be connected in series between the positive terminal PV(+) of the battery pack 110 and the positive connection terminal DC(+) of the battery device 100.
  • the precharge switch 132 may be a contactor composed of a relay.
  • the precharge switch 132 may be an electric switch such as a transistor.
  • the precharge circuit may further include a driver circuit (not shown in the drawings) which controls the precharge switch 132.
  • the sensing circuit 140 senses the voltage on a predetermined point in the battery device 100.
  • the sensing circuit 140 may sense the voltage of the positive connection terminal DC(+) of the battery device 100.
  • the sensing circuit 140 may include a plurality of resistors (not shown in the drawings) connected in series between the positive connection terminal DC(+) and a ground terminal. In this case, the sensing circuit 140 may sense a voltage obtained by dividing the voltage of the positive connection terminal DC(+) by the plurality of resistors, as the voltage of the positive connection terminal DC(+).
  • the sensing circuit 140 may further include an analog-to-digital converter which converts the voltage obtained by the voltage division using the plurality of resistors into a digital signal, and transmits the digital signal to the processor 150.
  • the processor 150 may control the operations of the switches 121, 122, and 132. Further, the processor 150 may set a precharge duration on the basis of the voltage sensed by the sensing circuit 140. In some embodiments, the processor 150 may diagnose the capacitance of the capacitor 11 on the basis of the voltage sensed by the sensing circuit 140. In some embodiments, the processor 150 may be, for example, a micro controller unit (MCU).
  • MCU micro controller unit
  • the sensing circuit 140 and the processor 150 may be included in a battery management system (BMS) of the battery device.
  • BMS battery management system
  • the processor 150 first closes the negative main switch 122.
  • the processor 150 closes the precharge switch 132 in the state where the negative main switch 122 is closed. Accordingly, precharge current can be supplied to the capacitor 11 of the external device 10 through the precharge resistor 131, whereby the capacitor 11 can be charged.
  • the duration when the precharge switch 132 is closed, whereby the capacitor 11 is charged may be referred to as a precharge duration.
  • the processor 150 closes the positive main switch 121 in order to transmit the voltage of the battery pack 110 to the external device 10.
  • the processor 150 can open the precharge switch 132. Therefore, it is possible to prevent rush current from occurring when the voltage of the battery pack 110 is supplied to the external device 10 by the voltage to which the capacitor 11 of the external device 10 has been charged. Closing a switch may be referred to as turning on the switch, and opening a switch may be referred to as turning off the switch.
  • precharge duration setting methods will be described with reference to FIG. 3 to FIG. 6 .
  • FIG. 3 is a flow chart illustrating an example of a precharge duration setting method of a battery device according to an embodiment
  • FIG. 4 is a drawing illustrating an example of an equivalent circuit of a battery device according to an embodiment during a precharge duration
  • FIG. 5 is a drawing illustrating an example of the voltage of a positive connection terminal in a battery device according to an embodiment
  • FIG. 6 is a drawing illustrating voltage ratios depending on multiples of a time constant.
  • the processor (for example, 150 in FIG. 1 ) of the battery device closes the negative main switch (for example, 122 in FIG. 1 ) (S310), and closes the precharge switch (for example, 132 in FIG. 1 ) (S320). Accordingly, a precharge duration starts, and the capacitor of the external device (for example, 11 in FIG. 1 ) can be charged.
  • the processor 150 After performing the precharge operation (for example, when the precharge duration ends), the processor 150 closes the positive main switch (for example, 121 in FIG. 1 ) (S340).
  • the processor 150 may apply the voltage of the battery pack 110 to the positive connection terminal DC(+) by closing the positive main switch 121.
  • the processor 150 measures the voltage of the positive connection terminal (for example, DC(+)) of the battery device sensed by the sensing circuit (for example, 140 in FIG. 1 ) (S330).
  • the processor 150 immediately after closing the positive main switch 121 (for example, immediately after applying the voltage of the battery pack 110 to the positive connection terminal DC(+)), the processor 150 measures the voltage of the positive connection terminal (DC(+)) of the battery device sensed by the sensing circuit 140 (S350). In some embodiments, after closing the positive main switch 121, the processor 150 may open the precharge switch 132 (S340).
  • the processor 150 estimates a target time of the precharge duration (hereinafter, referred to as a "target precharge time"), on the basis of the voltage of the positive connection terminal (DC(+)) of the battery device measured immediately before it closed the positive main switch 121 and the voltage of the positive connection terminal (DC(+)) of the battery device measured immediately after it closed the positive main switch 121 (S360).
  • the processor 150 may store the estimated target precharge time as the target precharge time of the current cycle.
  • the processor 150 sets the time of the precharge duration (hereinafter, referred to as the "precharge time") of the next cycle, on the basis of the target precharge time (S370, S380).
  • the processor may set the precharge time of the next cycle, on the basis of the target precharge times of a plurality of cycles.
  • the processor 150 may determine whether each of the target precharge times of a predetermined number of cycles has been estimated (S370). In the case where the target precharge times of the predetermined number of cycles have not been estimated (S370), the processor 150 may repeat the procedure from S310 when the next cycle starts.
  • the processor 150 may set the precharge time of the next cycle, on the basis of the target precharge times estimated in the predetermined number of cycles (S380). In some embodiments, the processor 150 may set the maximum value of the target precharge times estimated in the predetermined number of cycles, as the precharge time of the next cycle (S380). In some embodiments, the predetermined number may be 5.
  • an RC equivalent circuit may be formed by the battery pack 110, the precharge resistor 131, and the capacitor 11. Then, the voltage of the capacitor 11, that is, the voltage V DC of the positive connection terminal DC(+) increases on the basis of the time constant ⁇ of an RC equivalent circuit 410, as shown in FIG. 5 .
  • the voltage V DC of the capacitor 11 may vary, for example, as Equation 1.
  • Equation 1 the time constant ⁇ is defined as the product of the resistance value R P of the precharge resistor 131 and the capacitance C EX of the capacitor 11.
  • the processor 150 may estimate the time constant on the basis of the voltage V DC of the positive connection terminal DC(+) measured immediately before the positive main switch 121 was closed (the voltage of the capacitor 11 measured when the precharge duration ended), and the voltage V BAT of the positive connection terminal DC(+) (the voltage of the battery pack 110) measured immediately after the positive main switch 121 was closed.
  • the time constant ⁇ can be calculated from Equation 1 by setting the voltage of the positive connection terminal DC(+) measured immediately before the positive main switch 121 was closed, the voltage of the positive connection terminal DC(+) measured immediately after the positive main switch 121 was closed, and the precharge duration of the current cycle as V DC , V BAT , and t, respectively.
  • the processor 150 may set a target precharge time on the basis of the time constant ⁇ .
  • the processor 150 may set n times the time constant as the target precharge time (wherein n is a positive real number). As shown in FIG. 6 , in the equivalent circuit shown in FIG.
  • the voltage V DC of the capacitor 11 at 1 times the time constant ( ⁇ ) corresponds to 63% of the voltage V BAT of the battery pack 110
  • the voltage V DC of the capacitor 11 at 2 times the time constant (2 ⁇ ) corresponds to 86% of the voltage V BAT of the battery pack 110
  • the voltage V DC of the capacitor 11 at 3 times the time constant (3 ⁇ ) corresponds to 95% of the voltage V BAT of the battery pack 110
  • the voltage V DC of the capacitor 11 at 4 times the time constant (4 ⁇ ) corresponds to 98% of the voltage V BAT of the battery pack 110
  • the voltage V DC of the capacitor 11 at 5 times the time constant (5 ⁇ ) corresponds to 99% of the voltage V BAT of the battery pack 110.
  • the processor 150 may set 5 times the time constant (5 ⁇ ) at which the voltage V DC of the capacitor 11 becomes 99% of the voltage V BAT of the battery pack 110, as the target precharge time.
  • the processor 150 may set 5 times the time constant (5 ⁇ ) as the target precharge time, since the positive main switch 121 is closed when the voltage V DC of the positive connection terminal DC(+) reaches 99% of the voltage V BAT of the battery pack 110, damage to the positive main switch 121 can be minimized.
  • the maximum value of target precharge times of a plurality of cycles it is possible to select such a time that damage to the positive main switch 121 can be minimized, in consideration of the deviation of measurements in the plurality of cycles.
  • the precharge time is set on the basis of the target precharge times estimated in the predetermined number of cycles. Therefore, it is possible to set an accurate precharge time. In this case, even if the capacitance of the capacitor varies, the precharge time can be adaptively set. Further, since the voltage of the positive connection terminal DC(+) is measured immediately before the positive main switch 121 is closed and immediately after the positive main switch 121 is closed, it is possible to minimize the difference between the two voltage measurement time points. In other words, since the two voltage measurements are performed in substantially the same environment, it is possible to minimize errors in elements related to voltage measurement, thereby accurately estimating the time constant.
  • the processor 150 may set a precharge time in the next cycle, on the basis of the target precharge times estimated in the predetermined number of cycles, respectively. Therefore, the precharge time of the current cycle may be set on the basis of the target precharge times estimated in the predetermined number of previous cycles, respectively.
  • the precharge time of the i-th cycle may be set on the basis of the target precharge times estimated in the (i-5)-th to (i-1)-th cycles, respectively.
  • the target precharge times of the predetermined number of previous cycles required to set the precharge time of the current cycle are not stored. For example, in the first cycle, since no previous cycle has been performed, target precharge times of previous cycles may not exist. Further, even in the second to fifth cycles, since the predetermined number of previous cycles have not been performed, target precharge times of the predetermined number of previous cycles may not exist. In this case, the precharge time of the current cycle may not be set.
  • FIG. 7 is a flow chart illustrating an example of a method of setting an initial value of a precharge time in a battery device according to another embodiment.
  • the processor of the battery device closes the negative main switch (for example, reference numeral 122 in FIG. 1 ) (S710), and closes the precharge switch (for example, reference numeral 132 in FIG. 1 ) (S720). Accordingly, a precharge duration starts, and the capacitor of the external device (for example, reference numeral 11 in FIG. 1 ) can be charged.
  • the processor 150 may activate a timer to measure the elapsed time of the precharge duration. For example, the processor 150 may activate the timer when closing the precharge switch 132.
  • the processor 150 determines whether the precharge time of the current cycle has been set (S730). In some embodiments, the processor 150 may determine whether the precharge time of the current cycle has been set, on the basis of the target precharge times of the predetermined number of previous cycles (S730). In some embodiments, the processor 150 may compare the number of previous cycles in which target precharge times have been estimated, with the predetermined number (S730).
  • the processor 150 monitors the voltage V DC of the positive connection terminal (for example, DC(+)) of the battery device through the sensing circuit (for example, 140 in FIG. 1 ) (S740). While monitoring the voltage V DC of the positive connection terminal DC(+), the processor 150 compares the voltage of the positive connection terminal DC(+) with a predetermined voltage (S750).
  • the predetermined voltage is a voltage determined on the basis of the voltage V BAT of the battery pack (for example, 110 in FIG. 1 ).
  • the sensing circuit 140 may sense the voltage of the positive terminal PV(+) of the battery pack 110, whereby the processor 150 may measure the voltage V BAT of the battery pack 110.
  • the predetermined voltage may be set on the basis of the voltage V BAT of the battery pack 110 and m times the time constant (wherein m is a positive real number). In some embodiments, the predetermined voltage may be set such that the ratio of the predetermined voltage to the voltage V BAT of the battery pack 110 is equal to the ratio of the voltage of the capacitor 11 to the voltage V BAT of the battery pack 110 that is obtained in the equivalent circuit shown in FIG. 4 when the precharge time corresponding to m times the time constant elapses. For example, as the predetermined voltage, 86% of the voltage V BAT of the battery pack 110, that is, 0.86V BAT may be set on the basis of 2 times the time constant.
  • the processor 150 sets the precharge time (initial precharge time) of the current cycle on the basis of the time taken for the voltage of the positive connection terminal DC(+) to reach the predetermined voltage (S760).
  • the processor 150 may set the initial precharge time on the basis of the time taken for the voltage V BAT of the battery pack 110 to reach the predetermined voltage and m times the time constant used to set the predetermined voltage (S760).
  • the processor 150 may set k times the time taken for the voltage V BAT of the battery pack 110 to reach the predetermined voltage, as the initial precharge time (wherein k is a positive real number).
  • the initial precharge time may be set to (k*m) times the time constant.
  • (k*m) may be set to be larger than n times the time constant used to set the above-described target precharge time.
  • the initial precharge time is set to be long. Therefore, it is possible to minimize damage to the positive main switch (for example, 121 in FIG. 1 ) attributable to errors in voltage measurement.
  • the processor 150 closes the positive main switch 121 (S770).
  • the processor 150 closes the positive main switch 121 (S770). Accordingly, the precharge duration ends.
  • the processor 150 may open the precharge switch 132 after closing the positive main switch 121 (S770).
  • the processor 150 may measure the voltage of the positive connection terminal DC(+) of the battery device immediately before closing the positive main switch 121 as described with reference to FIG. 3 , and measure the voltage of the positive connection terminal DC(+) of the battery device immediately after closing the positive main switch 121.
  • the processor 150 may estimate the target precharge time of the current cycle on the basis of the voltage of the positive connection terminal DC(+) of the battery device measured immediately before it closed the positive main switch 121 and the voltage of the positive connection terminal DC(+) of the battery device measured immediately after it closed the positive main switch 121.
  • an initial precharge time can be set.

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Static Devices (AREA)
EP22887368.3A 2021-11-01 2022-09-23 Batterieverwaltungssystem, verfahren zur konfiguration der vorladungsperiode und batterievorrichtung Active EP4404426B1 (de)

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KR1020210147896A KR20230063056A (ko) 2021-11-01 2021-11-01 배터리 장치, 배터리 관리 시스템 및 프리차지 기간 설정 방법
PCT/KR2022/014260 WO2023075164A1 (ko) 2021-11-01 2022-09-23 배터리 장치, 배터리 관리 시스템 및 프리차지 기간 설정 방법

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CN (1) CN118140379A (de)
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US8203810B2 (en) * 2006-04-04 2012-06-19 Tyco Electronics Corporation Solid state pre-charge module
JP4552904B2 (ja) * 2006-06-23 2010-09-29 トヨタ自動車株式会社 車両の電源装置およびそれを搭載する車両
KR100867834B1 (ko) * 2007-08-16 2008-11-10 현대자동차주식회사 하이브리드자동차 고전압 릴레이 및 릴레이 제어회로의고장 진단 방법
KR20090039891A (ko) * 2007-10-19 2009-04-23 현대자동차주식회사 하이브리드 차량용 프리차징 제어방법
JP4821906B2 (ja) * 2009-11-27 2011-11-24 株式会社豊田自動織機 電源制御装置
JP2013205257A (ja) * 2012-03-28 2013-10-07 Sanyo Electric Co Ltd 電源装置、及びこの電源装置を備える車両並びに蓄電装置
CN106100059A (zh) * 2016-07-29 2016-11-09 观致汽车有限公司 预充电电路的控制方法、电池管理系统及车辆
KR102663546B1 (ko) * 2016-12-13 2024-05-08 현대자동차주식회사 차량의 고전압 직류 링크 커패시터의 프리차지 방법 및 시스템
JP7103199B2 (ja) * 2018-12-17 2022-07-20 株式会社デンソー プリチャージ制御装置
JP7013411B2 (ja) * 2019-04-10 2022-01-31 プライムアースＥｖエナジー株式会社 二次電池システム
JP7197441B2 (ja) * 2019-07-31 2022-12-27 株式会社ミツバ 電力供給装置、電力供給方法、および電力供給プログラム
KR102828969B1 (ko) * 2020-02-24 2025-07-02 엘에스일렉트릭(주) 인버터 초기충전회로의 고장진단장치 및 그 방법

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US20250183681A1 (en) 2025-06-05
JP7574994B2 (ja) 2024-10-29
ES3056541T3 (en) 2026-02-23
WO2023075164A1 (ko) 2023-05-04
EP4404426B1 (de) 2025-11-26
KR20230063056A (ko) 2023-05-09
EP4404426A4 (de) 2025-01-15
CN118140379A (zh) 2024-06-04
JP2023551119A (ja) 2023-12-07

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